请问这个SQL语句哪里错了 求大神? 400 报错

请问这个SQL语句哪里错了 求大神? 400 报错

package com.example.dictionary;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;

public class MyDataHelper extends SQLiteOpenHelper {

 final String CREAT_TABLE_SQL = "create table dict(_id integer primary key auto_increment,word,detail)";
 
 public MyDataHelper(Context context, String name, CursorFactory factory,
   int version) {
  super(context, name, factory, version);
  // TODO Auto-generated constructor stub
 }

 @Override
 public void onCreate(SQLiteDatabase db) {
  db.execSQL(CREAT_TABLE_SQL);
  // TODO Auto-generated method stub

 }

 @Override
 public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
  // TODO Auto-generated method stub
  System.out.println("The version have upgrate to"+newVersion);
 }

}

定义这个类   db.execSQL(CREAT_TABLE_SQL);

这句运行时报错

大概是指在“auto_increment附近出错”  刚学SQL  不知道哪里出错了呢  求大神指点指点